Granted Patent
Utility
US 4,674,422 · App. 06/894,117
Apparatus for sewing zipper chain to elongated fabric pieces
Inventor:
Ronald Boser
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Aug 7, 1986
Inventor
Ronald Boser
Assignee (at issue)
Yoshida Kogyo K.K.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.